diff --git a/moo/kernel/Collect.moo b/moo/kernel/Collect.moo
index a6c64aa..86aec09 100644
--- a/moo/kernel/Collect.moo
+++ b/moo/kernel/Collect.moo
@@ -211,10 +211,10 @@ class Set(Collection)
 		^ass
 	}
 
-	(* __assocPut: is a special internal method used by VM to add an association
+	(* __put_assoc: is a special internal method used by VM to add an association
 	 * to a dictionary with the dictionary/association expression notation.
 	 * :{ :( 1, 20 ), :( #moo, 999) } *)
-	method __assocPut: assoc
+	method __put_assoc: assoc
 	{
 		| hv ass bs index ntally key |
 
diff --git a/moo/lib/comp.c b/moo/lib/comp.c
index 606fa07..810e181 100644
--- a/moo/lib/comp.c
+++ b/moo/lib/comp.c
@@ -4136,11 +4136,11 @@ static int compile_dictionary_expression (moo_t* moo)
 			if (TOKEN_TYPE(moo) == MOO_IOTOK_ASSPAREN)
 			{
 				moo_oow_t si;
-				static moo_ooch_t msg[] = { '_', '_', 'a','s','s','o','c','P','u','t',':' };
+				static moo_ooch_t msg[] = { '_', '_','p','u','t','_','a','s','s','o','c',':' }; /* don't put '\0' at the back */
 				moo_oocs_t x;
 
 				x.ptr = msg;
-				x.len = 11;
+				x.len = MOO_COUNTOF(msg);
 				/* [ATTENTION] 
 				 *  if the method returns self, i don't need DUP_STACKTOP and POP_STACKTOP.
 				 *  if the method retruns something else, DUP_STACKTOP and POP_STACKTOP is needed
diff --git a/moo/lib/moo.h b/moo/lib/moo.h
index b1ec868..bef1617 100644
--- a/moo/lib/moo.h
+++ b/moo/lib/moo.h
@@ -1159,7 +1159,7 @@ enum moo_synerrnum_t
 	MOO_SYNERR_WHILE,         /* while expected */
 	MOO_SYNERR_NOASSKEY,      /* missing association key */
 	MOO_SYNERR_NOASSVALUE,    /* missing association value */
-	MOO_SYNERR_NOASSOC,       /* missing association */
+	MOO_SYNERR_NOASSOC        /* missing association */
 };
 typedef enum moo_synerrnum_t moo_synerrnum_t;